The rotary valve gear are what Tony is refering to however if you want to clean out the remains and begin new that is fine, once you get going with the new motor it is always good to use premix for the first couple tanks along with the OEM oiling, this helps in 2 ways, the new motor is insured of oil based on the mixing from the fuel system and it gives you time to troubleshoot any oil injection trouble which is a big problem when seadoo ownership changes - mixing oil types will easily cause the oil to gel and the heating from the motor does not have any effect to thin it out so the small oil lines and nozzles get jammed up and quit spraying in the oil needed during mid/high load and RPM - so to verify oiling fill the tank with whatever you can purchase that you will be able to purchase next season and after that - maybe OEM seadoo or something from a local auto parts that has a longterm foothold in your area, in the beginning of each season it is a good idea to begin with premix gas in 5 gallon loads and mark the tank to verify the oil is drinking, once you know the OEM oiling is working then just add gas and go the season, your breakdown drama will be very little if you begin the season this way.
